sales flow by charles.fsl

no_contact => lead -> in_contact -> call_scheduled;
              lead =>               call_scheduled => demo_completed => proposal_sent => deal_closed;
                                    call_scheduled ->                   proposal_sent;
                                    call_scheduled ->                                    deal_closed;

[no_contact lead call_scheduled demo_completed proposal_sent deal_closed in_contact] ~> close_lost;